Apparatus for duplicating phonographic records.



N0. 683,676. v l Patented Gebl', |90I.

vJ. W. AYLSWORTH &. W. H. MILLER.

APPARATUS FOR DUPLICATING PHDNOGRAPHIG RECORDS.

(Applimiop med my s1, 1900.)

(No Model.)

1n: nofws persas co, mo-mums.. wnsnmamu. n, c.

Err-nn STATES PATEN t-IONAS WALTER AYLSW'ORTI-I, OF EAST ORANGE, ANDWALTER HENRY MILLER, OF ORANGE, NEW JERSEY, ASSIGNORS TO NATIONALII-IONOGRAPII COMPANY, OF ORANGE, NEW JERSEY.

` APPARATUS FoR DUPLICATING PHoNoGRAPHlo RECORDS.

SPEGIFIGATIGN forming part of Letters Patent No. 683,676, dated October1, 1901. Application filed July 31,1900. Serial No. 25,392. (No model.)

.To @ZZ whom it Huey concern:

Be it known that we, JONAS WALTER AYLSWORTH, residing at East Orange,and IVALTER HENRY MILLER, residing at Orange, in the county of `Essexand State of New Jersey, citizens of the United States, have invented acertain new and useful Apparatus for Duplicating Phonographic Records,ot which the following is a specification.

Our invention relates to an improved apparatus for duplicatingphonographic records. In an application for Letters Patent led on evendate herewith, and numbered serially 25,391, we describe an improvedprocess or methed for duplicating phonographic records, which consistsin immersing in a bath of molten Wax-like coagulable material a matrixor mold Which carries on its bore the representation in negative orrelief of the record to be duplicated, whereby the molten material Williill the bore of the matrix or mold, but will be excluded from itsexterior, the reduced temperature of the matrix or mold relative to themolten material causing the latter to coagulate or chill upon thebore'of the matrix until a layer of the desired thickness has beensecured, after which the matrix or mold is removed from the bath ofmolten material and the bore of the duplicate finished by areaming-tool, the resulting duplicate being nally removed from thematrix' or mold by shrinking.

The objectof our present invention is to provide an improved apparatusby which the process in question maybe expeditiously carried out.

In order that our invention may be better understood, attention isdirected to the accompanying drawings, forming a part of thisspeciiication, and in which- Figure 1 is a sectional View of theapparatus and mold in which the deposit or coating of the Wax-likematerial is secured; Fig. 2, a corresponding view of the apparatus forproperly reaming the interior of the dupli- Cates; Fig. 3, a similarview of the apparatus employed for tlie shrinking of the duplicates fromthe matrix or mold, and Fig. 4 an enlarged corresponding view of one ofthe resulting duplicates.

In all of the above views corresponding parts are represented by thesame numerals of reference. Y

l represents a matrix or mold carrying on its bore the representation ofthe record which is to be duplicated, said representation beingobviously in negative or relief. This matrix or mold is made by anyapproved process and is not a part of our invention.

2 is a metal cap, which is removably fitted upon the upper end of thematrix or mold, with its bore corresponding in diameter with the bore ofthe matrix or mold.

3 is a metal disk provided With a handle 4T* connected to side bars 5 5and by which the disk may be manipulated. The matrix or mold 1 iscarried by the disk 3, as shown. An opening 6 in the disk 3 is ofconsiderably less diameter than the bore of the matrix or mold, andaround said opening 6 and Within the bore of the matrix or mold thedisk-may be formed in negative with a representation 7 of suitable wordsor characters to indicate the subject-matter of the duplicated record,its source of origin, &c. n

8 is a sheet-metal receptacle provided with a handle 9 and which carriesthe disk 3 and the matrix or mold 1, as shown. The receptacle S isprovided with an opening 10 therein, which may be of 'the same orloilarger size than the opening 6 in the disk 3.

ll represents a tank, which contains, as indicated, a proper supply ofsuitable wax-like material from which the duplicates are to be made,and-which material may be the ordinary commercial phonographiccompositions now in use. The material in the tank 11 may be kept in amolten condition by heat applied in any suitable way, as by means of agasburner 12.

In carrying out our process with the apparatus so far described We placethe matrix or mold on the disk 3 and insert the latter, carrying thematrix or mold in thereceptacle 8, as

shown,afterwhich the receptacle 8 isimmersed o 5 in the molten materialwithin the tank 11, which is permitted to enter the matrix or mold to apoint above the upper end of the latter,but below the top of the cap 2,so that the material fills the interior of the matrix or mold,but doesIco not overflow the same. The matrix or mold is thus kept immersed inthe molten material for the desired time required to secure ade'- positof the wax-like material ot' the required thickness. The reducedtemperature of the matrix or mold relative to the temperature of themolten material causes the latter to become coagulated or chilled ou theinterior of the matrix and to deposit thereon to the thickness desired.This chilling also makes the outer surface of the resulting duplicatesmuch smoother than is the-case with duplicates made by a mechanicalduplicating process. Owing to the thinness of the Walls of thereceptacle 8, the metal thereof very quickly attains the temperature ofthe molten material, so that none of the molten material will accumulatethereon. Vhen the desired deposit of molten material is secured,'thereceptacle 8 is removed from the bath of molten' material and the disk3, carrying the mold, is removed lfrom said receptacle. Obviously thelower edge of the resultingduplicatewill be perfectly-true, being formedby the'portion' of the disk-3 between theopening t-andV thebore of thematrix or mold, and if a rep-q resentation 7 is `formed on that portionof theV disk-such representation will be castin` the bottom end of theduplicate. now/'removed -from the matrix or mold and the upper end ofthe duplicate is trimmed off flush' with the'upper surface 'of the'matrix or V`mold by any desired form of cutting-tool.

The-matrix ormold, Whichhas'a slightlytaperedV outer surface, is noW=placedin a` tapered chuck13, as shown in Fig. 2, Whichl chiuckisprovidedwith a water-jacket 14,-

through lwhich cold Water may circulate in` order that the matrix ormold may be kept colde'n'ough to maintain the resultingyduplicate, or atleast the outer surfacethereof, in' a chilled and hardened condition.The chuck 13 being rotated in any suitable Way, a reamin'g-:tool 15 is'introduced within the same,

and' by reason of-the cut-away portionsl'y in'lsaid reamin'g-tool aseries of ribs will be formed on the duplicate, as shown in Fig.4-, bywhich the latterwill be properly held upon the mandrel ofthereproducingphonograph ini-the usual Way. The reamin'g-tool lcarriesfxononeface an auxiliary cutting-blade 17 asf shown, pivotedfat one end andadj ust ableat the other by means of adj usting-screws 18; Bych'an'gingthe inclination of this cuta ting-blade 17 the depth and taper of vtheribs caube regulated with the utmost certainty, so thatthe record can beaccurately fitted to the tapered mandrel of the reproducing instrument.In other words, the ribs which are formed by the' cut-away portion 16 ofthe reaming-'tool will bythe auxiliary bladel'? be cut togradually-increasingdiameters from oneend of the duplicate to the other,so that the'fduplic'ate will be frictionally receivedl u'ponthe usualtaperedmandrel.i The reamin'g-to'ol 15' iscarried bythe `usualslide-:head1 19fof the'lathe, and th'e'd'epth of cut of said The capl 2is tool is limited-by a regulating-screw 20, as shown. After theinteriorof the duplicate has been properly reamed, as explained, thematrix or mold is removed from the chuck 13 and inserted in acooling-mold 21, having a water-jacket 22, and through which cold watermaycirculate, the matrix or mold being keptin the cooling-mold until theresultling duplicate has contracted sufficiently to enable it to beremoved from the matrix or mold, whereupon the operation will becompleted. By roaming the interior of the resulting duplicates, asexplained7 to form a series of ribs therein the duplicates may be mademuch thinner than the ordinary original records, and hence moreeconomically, it being of course understood that the material removed bythe roaming-tool will be used for the manufacture of' subsequentduplicates.

Having now described our invention, what we cla-im as new, and desire tosecure byLetters Patent, V is asfollows': Y

1. An'improved apparatus forduplicating phonographic records, comprisinga rec'ep# tacle carrying a matrix' or mold, the latter h'avingthe recordin relief on its bore, and an opening in said receptacle concentric withthebore' ot' the matrix or mold, whereby the receptacle with the matrixor mold may be immersed in abathy of molten, Wax-like material to fillthe bore ofthe'matrix ormold but to be excluded from its exterior,substantially as set forth. Y

2. An improved apparatus for duplicating phonographic records,comprising' 'a recep tacle having an opening in its bottom',` a diskcarried by the Vreceptacle and havingfa correspending opening, and amatrix ormold seated'upon said disk'withV its'bore concentric with theopening therein, whereby the-recepitacle With-the matrix or mold may'bei imxmersed in abath of molten, Waxelike'material `'to till the boreof the matrix or mold' butto be` excluded from its exterior,substantially as set forth'.

y 3. An improved 'apparatus for duplicating." phonographic records,comprising; a receptacle having Yan 'opening in its bottom,adisk"'carried by the receptacle and havinga'cor# responding opening, andamatri'xo-r 'mold 'seated upon said'diskwith its bore concentric withthe'opening` therein, W-herebyf the kreceptacle with the `matrix ormold' may'be immersed in a bath of molten, Wax-likemal terial to illthebore of' the matrixjor mold butto be excluded from:itsexteriorythediskbeingprovidedfbetween the opening, therein and the bore of the matrix ormold'With a" representationV to' be moldedA upon theen'd of the desiredduplicates, substantially V'as lset forth. f

4E.' An improvedapparatus for duplicating phonographic v records,comprising' a. recep? tac'le having an opening 'in'its bottom, aimatrixforimold seatedover said'openngand'carr rying on,` its" bore'ftherepresentation? infrelief of therec'ord to "be duplicated, and' alre-IOO IIO

movable cap carried by the upper ond of the matrix or mold, whereby byimmersing the receptacle in a bath of molten material the latter mayenter the bore of the matrix or mold above the upper end thereof withoutoverflowing to contact with its exterior, substantially as set forth.

5. An improved apparatus for making duplicate phonographic records,comprising a matrix or mold carrying on its bore the representation ofthe record to be duplicated, a disk upon which said matrix or mold isseated, said disk carrying concentrically within the bore of the matrixor mold a designation of such record, and means for depositing moltenmaterial within the matrix or mold and upon said disk, whereby theduplicate record will be formed and its designation be simultaneouslycast or impressed upon the end thereof, substantially as and forthepurposes set forth.

6. An improved apparatus for duplicating phonographic records,comprising the combination with means for securing a deposit of awax-like coagulable material upon the bore of a matrix or mold whichcarries the representation of the record to be duplicated, of means forfinishing the interior of the duplicate while the latter is in positionWithin the matrix or mold, substantially as set forth.

7. An improved apparatus for duplicating phonographic records,comprising the combination with means for securing a deposit of awax-like coagulable material upon the bore of a matrix or mold whichcarries the representation of the record to be duplicated, of means forforming within the duplicate while the latter is in position in the molda series of concentric ribs of gradually-increasing diameters from oneend of the duplicate to the other, whereby the duplicate may be properlyreceived upon a tapered mandrel, substantially as set forth.

This specification signed and witnessed this 17th day of July, 1900.

JONAS WALTER AYLSWORTII. WALTER HENRY MILLER. Witnesses:

Jos. EvANs, ELIZABETH EVANS.

